Grain-cleaning machine



(No Model.)

WITNESSES; v INVENTOR (/7 A MM L g? b r* ATTORNEYS.

UNTTED STATES PATENT Trice.

BAXTER WRIGHT, OF MARSHALL, MINNESOTA.

GRAIN-CLEANING MACHINE.

SPECIFICATION forming part of Letters Patent No. 248,546, dated October 18, 1881.

Application filed May 7, 1881. (N0 model.)

To all whom it may concern Be it known that I, BAXTER WRIGHT, of Marshall, in the county of Lyon and State of Minnesota, have invented a new and Improved Grain-Cleaning Machine; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a perspective view, Fig. 2, a detail, in perspective, ofthe gangofcheck-boards; Fig. 3, a similar view of the chute and sieve in which the check-boards are placed. Fig. 4 is an end view of the chute and sieve with the check-boards in place, and Fig. 5 is a fragmental view, in longitudinal section, of the same.

My invention relates to certain improvements in grain-cleaning devices of that type in which one or more inclined sieves are pro vided with a series of check-boards, which, reaching nearly to the sieve, retard the passage of the grain and facilitate elimination of the cockle and small seed by causing them to pass through the said sei-ve, while the clean grain passes out at the end of the screen.

My invention consists in providing a chute with a straight single sieve in the same, forming a false bottom, and combining therewith a gang of check-boards, held together by side strips,and having on their lower edges curved metal strips, which gang of check-boards fit within the sides of the chute and are made integrally adjustable byslots and set-screws to or from the false bottom according to the size or character of the grain or the degree of dampness of the same.

In the drawings, H is the hopper, and A the gate forregulating the discharge of grain therefrom. This hopper is placed upon the high end of the chute B, which is maintained in an inclined position by props or legs L. As the grain is discharged from the hopper H it is first received upon a coarse screen, S, which serves to carry off the impurities that are larger than the wheat-grain, delivering said impurities at the spout W. This screen is sustained upon the chute B in inclined position by braces T, which have a series of holes in their ends for adjustable connection with the sides of chute B, to regulate the inclination of the said screen. The chute has a bottom, P, and two sides, B B, and a short distance above its bottom is arranged the principal screen 0, Whose meshes are not large enough to allow the perfeet grains to pass through, but large enough to let cockle, small seed, and sand pass through and be delivered upon the bottom P for separation.

Fitting within the sides of the chute is the gang of check-boards composed of a series of transverse boards, K, and side strips, C. These check-boards have at their lower ends curved metal strips N, that are concaved upwardly with respectto the incline and closely approach the screen 0, while the side strips, 0, have in them transverse slots 0, and are secured adjustably in the side walls of the chute by setscrews 1). By means of these slots and setscrews the entire gang of checkboards may be at once adjusted closer to or farther from the screen 0, according to the peculiar requirements of the ease.

The action of the devices, as thus described, is very simple, as the grain passes through it ofits own gravity without any shaking, while the check-boards-and strips N cause the grain to be retarded and rolled about over the screen to secure a very effective cleaning action.

I am aware that grain-cleaning devices consisting of a screen with check'boards have been heretofore used, and therefore only claim my peculiar construction of device, which is characterized by the following distinctions: First, the upwardly-curved strip N allows the check-boards to be setvery close to the screen withoutjam ming or breaking the grain; and,

secondly, the slotted connection between the side strips of the gang of check-boards and the chute permits the entire gang to be evenly and accurately adjusted at one time.

Having thus described my invention, what I claim as new is- The combination of the chute composed of the bottom P and sides B, the screen 0, with the gang of check-boards K, having upwardlycurved metal strips N at their lower edges, and transversely-slotted side strips, (3, the said gang ofcheck-boards and the chute being connected together adjust-ably by set-screws, as described.

BAXTER WRIGHT.

Witnesses:

DANL. FoLsoM WEYMOUTH, V. B. SEWARD, J. W. BLAKE, CHARLES EDWIN PATTERSON. 

